Earth and its neighbors orbit the sun on a relatively flat plane. But what's below this plane, and is anythign below the ...

Most people think they know exactly where “down” is. It’s the direction your feet point. But that familiar sense of ...

Planet 9 sits at the edge of scientific imagination, promising either an epic expansion of the Solar System or a lesson in ...

What is “down” in the vastness of space? Scientists reveal how gravity, cosmic planes, and perspective redefine direction, ...

Last week, the US Space Force posted a photo online from its uncrewed X-37B space plane's seventh mission, showing the orbital test vehicle above our planet in High Earth Orbit. Now that's a selfie ...

Astronomers have discovered an unusual Earth-sized exoplanet they believe has a hemisphere of molten lava, with its other hemisphere tidally locked in perpetual darkness. Co-authors and study leaders ...

AMES, Iowa – Using data from NASA’s Kepler space telescope, an international team of astronomers has discovered a distant planetary system featuring multiple planets orbiting at a severe tilt to their ...

Researchers uncover how Mars affects Earth’s orbit, offering new insight into the planetary forces behind ice ages.